Portable brake shoe



Dec. 4 1923.

1,476,099 G. E. os'rERMAN PORTABLE BRAKE SHOE Filed July 14'. 1921 Hll!! Patented ec. 4, i923..

GUSTAF i E. os'rfnniuaiv'; or MONTREAL; elimine, "CANADA PORTABLE BRAKE suon.

Appucation fued July 14, 1921. seria1-1v0;.4s4,s2a

To @Hicham t may concern.'

Be it known that I, GUSTAF E. O sTnRMAN, a subject of the King) of Great Britain, residing at Montreal, rovincev of Quebec, Dominion ofCanada, have invented new and useful Improvements in Portable Brake Shoes, of which the following is a'speciiication.

This invention relates to improvements in braking devices for railway cars and has for its object to provide means whereby a lcar may be stopped while moving on the rails either on a grade or shunting.

A further object is to provide a portable brake shoe that can be readily applied to the rail and will be locked to the car wheel when the latter mounts the brake shoe.

This invention consists in the novel features of construction combination and arrangement of parts as set forth in detail hereafter. Y

Reference is to be made to the accompanying drawings in which- Fig. l is a side view of the brake shoeA mounted on the rail with the car wheel in a locked position.

Fig. 2 is a cross sectional view of Fig. l, on line 2 2.

Fig. 3 is a perspective view of the brake shoe. Fig. 4 is a plan view of the shoe.

The brake shoe consists of the base A, having a flat 'lower surface A1., adapted to rest on the rail F, and a flanged edge B, extending the full length of the shoeon one side.

The upper surface C, is curved as shown in Figs. l and 2, and rises from the-edge A2, to the apex A3, and then descends sharply to the edge A4. The upper portion of the shoe may be hollow or cut away for the sake of reducing the weight of the shoe as'shown in Figs. l and 2.

Securely attached to the side opposite to the iiange B, are two or more springs E E projecting downwards and adapted to grip the head of the rail F, rwhen the shoe isV placed in position as shown in Fig. 2.

@n the upper surface C, about the middle of the curve is situated a diagonal slot extending towards the spring E side of the shoe and running towards the end A2.

The inner portion of the slot K, has a4 fiat surface L, while the outer portion has a bevelled surface M.

In the slot-K, a hookD,hish/loosely secured by therivet II,;andl'adjusted so that the hook D,.normally restson the bevelled surface M,..and .the end D1,y projects above the surface C,while 'the bend D2,.- is swung'l downwards to permit the rim of the car wheel to mount the curve C,.

The operation -of my invention is as follows The shoe is placed onv the rail with the thin edge facing the moving car that it is desired to stop. The Vflange B, and the springs E, E, hold the shoe securely in po-l sition on the rail.

When the wheel of the advancing car ascends the curvedsurface C, and reaches the hook D, it forces down the end D1, causing the .bend D2., to rise and grip the outer rim of the car wheel Gr', thereby 'locking the shoe A, to the wheel G. f

The shoe is therefore carried alongV the n rail by the momentum ofthe car until it slows down and stops the car.

What I claim is:

l. In a brake shoe the combination of a body portion having a lower flat surface adapted to rest on a rail, an uppercurved surface adapted to lsupport the tyre of a car wheel and a hook adaptedto lock the shoe to the wheel, one end of which projects normally above the curved surface.

2. In a brake shoe the combination of a body vportion having a lower flat surface adapted to rest on a rail, an upper curved surface adapted to support the tyre of a car wheel and a hook pivoted in a slot in the curved surface adapted to lock the shoe to the car wheel. j

3. In a brakel shoe the combination of a body portion having a lower flat surface adapted to rest o'n a rail an upper curved surface adapted to support the tyre of ai car wheel and a hook pivoted in a diagonal slot on the surfacev of the shoe adapted to lock the shoe Yto the car wheel;

4. In a brake shoe the combination of a y body portion having a'lower` flat surface adapted to rest on a rail, an upper curved i' surface adapted to support the tyre of a car wheel, and a hook pivoted in a slot on the surface ofthe shoe with its innerend normally projecting above'the upper surface of the shoe andits outer bent end depressed w Y l no Y to permit the tyre of the car wheel to pass in mounting.

5. In a brake shoe the combination of a body portion having a lower flat surface adapted to rest on a rail, a" flange on one side anatl a plurality of springs projecting downwards from the other side and adapted to hold the shoe in position, an upper curved surface with a hook pivoted in a diagonal Lslot on the curved surface, normally with its curved end depressed outwardly and its inner end projecting above the curved surface, adapted to lock the shoeto the wheel of a car automatically. w

6. In a brake shoethe combination of a body portion having a lower flat surface adapted to rest on a, rail and means to hold the shoe in position thereon, and an upper curved surface adaptedto sup-port the tyreY .l

of a car wheel with a'vhoolr pivoted in the curved surface, adapted to lock the shoe to the wheel.

7 Ina portable brakeehoe, a hook member loosely pivoted'in a transverse slot in the' curved surface of the shoe adapted to grip the outer rim of a car wheel.

8; ln a brake shoe the combination of a body portion with a curved upper surface and a hook member p-ivoted transversely thereim adapted to lock thegrim of a` wheel that has mounted the shoejy Gus-TAF E. osTERMAN. 

